Unit check

Unit Check




Select the item you want to check and the diagnostic starts.

Display




This diagnostic performs additional checks on the communication bus between the control unit and the display. In addition, the internal electronics and touch screen functionality are confirmed.
- When the connection is NG, first check for loose terminals at the navigation unit and the display unit connections. Next check for an open or short in the communication line between the navigation unit and the display unit. If the line is found to have an open or short, replace the affected shielded harness.
- If the ROM or RAM is NG, replace the display unit.
- Touch sensor checks the functionality of the touch screen.
- The version represents the software version in the display.

NOTE: When selecting this diagnostic from "Unit Check," quickly remove your fingers from the touch-screen to avoid a false detection.

Radio




If the NG is indicated, check for loose audio unit connector.

NOTE: If the XM link was displayed red, but the radio link was displayed green in the navigation system link, refer to the audio system symptom troubleshooting. Index, Symptom Troubleshooting

Navi ECU
This screen looks for problems the navigation unit. When this diagnostic is initiated, there is a delay of up to a minute while it runs.

NOTE: Do not try to end this diagnostic by pressing "OK" or "Mem clear" before it finishes, otherwise the system will reboot.
- "ROM (Application)", and "RAM (Loader)" are for factory use.
- If "V-RAM" or "D-RAM" is NG, then replace the navigation unit.
- If "GPS" indicates "NG (ANT)", then check the entire GPS antenna wire from the navigation unit to the antenna. If the wire is crushed or damaged, try a known-good antenna. If this diagnostic reads OK, then replace the GPS antenna. If the diagnostic still reads NG (ANT), then replace the navigation unit.
- "DVD ROM" represents the database version on the DVD. This information can also be found in Setup Screen 4 by Selecting System Information.
- "Serial No." should be the same as the serial number found on the underside of the navigation unit. This number is needed to obtain the security code from the Interactive Network (IN) system.




- The "Mem Clr" is for factory use and should not be used unless instructed by the factory. Selecting this will erase the customer's settings, personal information, GPS orbital data, and anything else stored in memory.

PC Card info.




There is no PC Card in the PC card slot, and the screen should say, "PC Card is not inserted".

NOTE: Do not insert any card or object into the slot.




If the factory provides a PC card and instructs you to insert a card, then the screen displays the Manufacturer, and Product Name as shown in the above screen.